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Show 1870.] MR. P. L. SCLATER ON NEW TYRANNID/E. 831 the state of the hinder grinders shows that it had not reached adult age ; it shows no sign of sexual organs, but is most probably a female. It died soon after its arrival at the Gardens, and unfortunately had not had time to recover the effects of its confinement on the voyage. The tips of the long hairs of the fur of the greater part of the body have been worn off, leaving only a lead-coloured cottony wool. The head, neck, and outside of limbs, where the tips of the long hairs remain, are exactly the same colour as the fur of the British- Museum specimen of Hapalemur griseus, not showing the slightest reason for believing that one would be called H. griseus and the other H. olivaceus. I have retained the name of H. griseus for the specimens we received from Dr. Meller, which Mr. Sclater determined in the < Proceedings' of this Society to be of that species, but which have the fur much more fit to be called olivaceous than grey. P.S.-I have to-day (Dec. 9th) been able to obtain from the Society Pollen and Van Dam's 'Faune de Madagascar;' and I see clearly that the animal that I have described as Hapalemur simus is the Hapalemur griseus of those authors (p. 6, tab. iii.) ; for at tab. vii. fig. 4 they figure the skull, showing the truncated form of the nose and the wide palate. They consider it the same as the Hapalemur griseus of Geoffroy St.-Hilaire, and also Hapalemur olivaceus of Isidore Geoffroy, observing, " Le crane avec ses dents ne s'eloigne en aucune maniere de celui du soidisant Lemur griseus; mais cette partie pre'sente, suivant les individus, des differences tres-sensibles par la forme des orbites, tantot orbiculaires, tantot un peu elliptiques, par les nasaux tantot saillants, tantot rentrants, par le manque ou l'existence d'incisive a la machoire superieure, et par d'autre traits de moindre importance." I had no doubt of H. simus being quite distinct from what we had called H. griseus in England. The upper cutting-teeth of the Museum skull of H. simus are as distinct as they are in H. griseus. 7. Descriptions of three apparently new Species of Tyrant-birds of the Genus Elainea, with Remarks on other known Species. By P. L. SCLATER, M.A., Ph.D., F.R.S. I. ELAINEA GIGAS, sp. nov. (Fig. 1, p. 832.) Elainea albiceps, Scl. P. Z. S. I860, p. 71, et Cat. A. B. p. 217 (nee Lafr. et D'Orb.). Supra fuscescenti-olivacea, uropygio paulo dilutiore: pilei medii plumis ad basin late albis, fusco terminatis: alis caudaque fuscis, alarum tectricibus et secundariis albido marginatis : remigibus primariis et rectricibus olivaceo anguste fimbriatis .- subtus pallide grisea, subalaribus, remigum marginibus internis |